... , BStandard specification for Seamless Carbon Steel Pipe for high temperature serviceASTM A106A, B, CStandard specification forSeamless Carbon Steel Boiler Tubes for High-PressureServiceASTM ... specification forHot-Formed Welded andSeamless Carbon SteelStructural TubingASTM A501A501Alloy steel tubes for machine purposesJIS G3441SCr420TK, SCM415TK,SCM418TK,SCM420TK,SCM430TK,SCM435TK, SCM440TK ...